MMORPG?

Okay, I know, I know, making an “MMO” on your own is supposed to be impossible, but it’s worth a try ain’t it? I recently started development on a small scale vr game, and wanted to know HOW to do networking things. I’ve researched things like PUN, Smart Fox, Unet, Game Sparks, Hero, etc. I think the best option for my case would be making my own server. Are there any people out there, or guides, that would be able to help me with this. I have almost no knowledge on networking. One example I want to follow that of a game called OrbusVR. Again, I know this is a very naive and open-ended question, but I really need a starting point, or play by play on what to do. All the networking guides I have found seem to only be used on browsers and not actual games.
P.S. I’m not starting smaller multiplayer projects because no project has the same server set up as an open world mmo. Also i have my own physical servers I can and want to use, so I do not need hosting. Thank you!

You might want to look into unets llapi. i see people on here that seem to like it.

Here is a good start point

uNet NetworkServerSimple and NetworkClient are good classes to work with